Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Iron group metal
Patent
1998-04-28
1999-03-30
Bos, Steven
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Iron group metal
423544, C22B 2300, B01D 1100, C01B 1700
Patent
active
058884629
ABSTRACT:
A method of solvent extraction of a nickel sulfate solution uses a multi-stage, counter-current, organic solvent extraction system composed of at least two extractors connected in series, and includes a first extraction step of feeding a crude nickel sulfate solution that contains sodium and ammonium impurities into a second-stage extractor, wherein it is treated in countercurrent flow and at a pH of 6.5 to 7.0 with an organic extractant fed into the second-stage extractor from the first-stage extractor, to thereby extract some of nickel in the crude nickel sulfate solution into the organic extractant; and a second extraction step of transferring the nickel-containing, organic phase to an organic phase-scrubbing step to remove sodium and ammonium, while transferring the nickel sulfate solution, from the first extraction step and from which some of nickel has been removed, to the first-stage extractor, wherein it is treated in countercurrent flow and at a pH of 5.5 to 6.5 with a fresh organic extractant, to thereby extend the remaining nickel in the nickel sulfate solution into the organic extractant. The nickel-containing organic phase from the second extraction step is divided into two portions, one portion being fed into the second-stage extractor while the other portion is transferred to a by-pass, organic phase-scrubbing step it to remove sodium and ammonium.
REFERENCES:
patent: 3069231 (1962-12-01), Hard et al.
patent: 3336133 (1967-08-01), Funatsu et al.
patent: 4196076 (1980-04-01), Fujimoto et al.
patent: 4600435 (1986-07-01), Wiegers et al.
patent: 4900522 (1990-02-01), Chou et al.
patent: 4956154 (1990-09-01), Magdics et al.
patent: 4975253 (1990-12-01), Monzyk et al.
patent: 5028403 (1991-07-01), Rickelton et al.
patent: 5399322 (1995-03-01), Coltrinari
patent: 5470553 (1995-11-01), Hao-chung et al.
Imamura Masaki
Makino Susumu
Ozaki Yoshitomo
Takaishi Kazuyuki
Tsuchida Naoyuki
Bos Steven
Sumitomo Metal & Mining Co., Ltd.
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